Originally Posted by oliver2002

Some LH/LX A330s will go to 4Y and SN. The extra weight story is a nice joke, but over all the switch to the new cabin will result in an overall weight reduction. The weights in the tail are required due to the dramatic reduction in weight in the PE/Y cabin and the galleys. Materials have evolved over time and seat construction has become much lighter since 2008-09 when the A330 was specified.